A mid-infrared biaxial hyperbolic van der Waals crystal
Zebo Zheng,Ningsheng Xu,Stefano Luigi Oscurato,Michele Tamagnone,Fengsheng Sun,Yinzhu Jiang,Yanlin Ke,Jianing Chen,Wuchao Huang,William L. Wilson,Antonio Ambrosio,Shaozhi Deng,Huanjun Chen +12 more
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TLDR
In this paper, a van der Waals crystal, α-MoO3, is shown to support in-plane hyperbolic polariton guided modes at mid-infrared frequencies without the need for patterning.Abstract:
Hyperbolic media have attracted much attention in the photonics community due to their ability to confine light to arbitrarily small volumes and their potential applications to super-resolution technologies. The two-dimensional counterparts of these media can be achieved with hyperbolic metasurfaces that support in-plane hyperbolic guided modes upon nanopatterning, which, however, poses notable fabrication challenges and limits the achievable confinement. We show that thin flakes of a van der Waals crystal, α-MoO3, can support naturally in-plane hyperbolic polariton guided modes at mid-infrared frequencies without the need for patterning. This is possible because α-MoO3 is a biaxial hyperbolic crystal with three different Reststrahlen bands, each corresponding to a different crystalline axis. These findings can pave the way toward a new paradigm to manipulate and confine light in planar photonic devices.read more
Citations
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Journal ArticleDOI
Topological polaritons and photonic magic angles in twisted α-MoO 3 bilayers
Guangwei Hu,Guangwei Hu,Qingdong Ou,Guangyuan Si,Yingjie Wu,Jing Wu,Zhigao Dai,Zhigao Dai,Alex Krasnok,Yarden Mazor,Qing Zhang,Qiaoliang Bao,Cheng-Wei Qiu,Andrea Alù,Andrea Alù +14 more
TL;DR: In this paper, it was shown that the photonic dispersion of phonon polaritons in van der Waals bilayers flattens, exhibiting low-loss tunable polariton canalization and diffractionless propagation with a resolution of less than λ0/40, where λ 0 is the free space wavelength.
Journal ArticleDOI
Generalized laws of reflection and refraction from transformation optics
Yadong Xu,Kan Yao,Huanyang Chen +2 more
TL;DR: In this article, a transformation media slab is derived as a meta-surface, producing anomalous reflection and refraction for all polarizations of incident light, based on transformation optics.
Journal ArticleDOI
Configure polaritons in twisted $\alpha$-MoO3
TL;DR: In this paper, the configuration of nanoscale light-matter waves-the polaritons-by twisting stacked molybdenum trioxide (MoO3) slabs in the broad range of 0.
Journal ArticleDOI
Hyperbolic metamaterials: From dispersion manipulation to applications
TL;DR: Hyperbolic metamaterials (HMMs) as mentioned in this paper are an important class of artificial anisotropic materials with hyperbolic IFCs, which have been intensively investigated.
Journal ArticleDOI
Hyperbolic metamaterials: fusing artificial structures to natural 2D materials
Dasol Lee,Sunae So,Guangwei Hu,Minkyung Kim,Trevon Badloe,Han-Chul Cho,Jaekyung Kim,Hongyoon Kim,Cheng-Wei Qiu,Junsuk Rho +9 more
TL;DR: Hyperbolic metamaterials have an extremely high anisotropy with a hyperbolic dispersion relation and exhibit a high density of states which have been exploited in various applications, such as super-resolution imaging, negative refraction, and enhanced emission control as mentioned in this paper .
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